Heat-generating bag



Feb

J. H. DAVlDSON HEAT GENERATING BAG Filed Oct. 12,- 1923 Patented Feb. 3,1925.

UNITED STATES PATENT OFFICE.-

J'ASPEB HENRY DAVIDSON, 0F HOUSTON, TEXAS, ASSIG-NOR OF THREE-FOURTHS'10 E. MARVIN BAILEY, 0F HARRIS GOUtN'l'Y, TEXAS.

HEAT-GENERATING BAG.

Application filed October 12, 1923. Serial No. 668,106.

To all whom it may concern:

Be it known that JASPER HENRY SON, a citizen of. the United States,residing at Houston, inthe county of Harris and State of'Texas, hasinvented certain new and useful Improvements in a Heat-Generating Bag,of which the following is a specification.

This invention relates to new and useful improvements in a heatgenerating pad.

One object of the invention is to provide a pad'containing a heatgenerating mixture and. designed to take the place of the ordinary hotwater bottle.

In use, if desired, the pad may be inserted in a suitable covering, andfor this purpose an ordinary wall syringe may be utilized, as aconvenient covering to receive and protect the pad. With the above andother objects in view, this invention has particular relation to certainnovel featuresofconstruction and use, an example of which is given inthis specification, and illustrated in the accompanying drawings,wherein a Figure 1 shows a plan view of the heat generating pad.

Figure 2 shows a plan view syringe, partly broken away.

Figure 3 shows a vertical sectional view thereof, and

Figure 4 the generating pad.

In the drawings the numeral 1 designates a sack, preferably of fabric.This sack is first sewed along the sides and one end, leaving the otherend open for filling the sack, and when the same is filled, this end maythen be sewed up.

The sack is filled with a mixture 2, consisting of powdered willowcharcoal, salt,

of a wall sodium carbonate, sal ammoniac, and iron sodium carbonate,one-fourth ounce of sal oxide. The proportions of the ingredients namedare approximately four grains of charcoal, six grains of salt, eightgrains of Dnvmis a vertical sectional .view of ammoniac, and fourteenand one-half ounces of iron oxide.

For a sack, or pad, of ordinary size. about fifteen ounces of themixture is sufiicient to generate the required heat. The mixture is putinto the sack, as above explained, when it is desired to use the same,but before closing said open end, about one-half ounce of water shouldbe added to the chemicals,

and the pad thoroughly shaken to distribute the moisture and obtain thedesired degree of heat. When the pad begins to cool, the temperature maybe a ain raised by. shaking the pad, provided 1t still containsmoisture. If it contains no moisture, one end of the pad may be openedand more water added, and. said end again closed, and the pad againshaken to distribute the moisture. When water is added, the second timemore of it is required, for the reason that the chemicals haveexpandedand consequently require more moisture. An ordinary rubber hot waterbottle may be substituted instead of the fabric sack, if desired, andthe chemicals and water added as above stated.

ordinary wall syringe 3, as indicated in Figures 2 and 3, and the padwill thus be inclosed and protected, and prevented from becoming soiledor worn.

What I claim is: A heat generating mixture consisting of one-half ouncesof iron oxide.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

' JASPER HENRY DAVIDSON.

Witnesses: Y

Dr. M. D. BAILEY, Wu. A. (EA-nun approximately four grains of powdered

